Insulating clamp

Abstract

The invention discloses an insulating clamp which solves the technical problem that an insulating clamp in the prior art is not provided with an automatic locking mechanism. The insulating clamp comprises a static clamp body and a movable clamp body which are insulated and hinged in a crossed mode, and further comprises a first insulating rod, a second insulating rod, a ratchet wheel base, a ratchet wheel, a swing piece and a hinge rod, the first insulating rod is fixedly connected with the static clamp body, the second insulating rod is hinged to the movable clamp body, the ratchet wheel base is fixed to the first insulating rod, and the ratchet wheel is rotationally connected to the ratchet wheel base. One end of the hinge rod rotates along with the ratchet wheel, the other end of the hinge rod is hinged to the second insulating rod, the swing part swings relative to the ratchet wheel seat, a first pawl is arranged on the swing part, and the hinge rod rotates relative to the ratchet wheel seat and drives the movable clamp to rotate relative to the static clamp through the second insulating rod. The swing part can swing to the looseness-stopping position so that the insulating clamp can have a looseness-stopping state, and in the looseness-stopping state, the first pawl stretches into one tooth groove so as to limit the output end of the movable clamp to rotate in the direction opposite to the output end of the static clamp.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of insulation tongs, and particularly to insulation tongs with a self-locking function. BACKGROUND

[0002] In the field of live work for electrical equipment installation, maintenance and repair, insulation tongs are one of the core tools. They need to have good insulation performance to withstand high voltage, act as a safety barrier between the operator and the live conductor, and are widely used in high-voltage switch operation, knife switch control, busbar maintenance, and high-voltage fuse removal and installation, etc.

[0003] The existing insulation tongs usually have no automatic locking mechanism, and the clamping operation completely depends on the hand strength of the operator to maintain the clamping state, which makes the operator prone to fatigue and may cause the conductor to slip and fall. SUMMARY

[0004] The present application is proposed to overcome the deficiencies of the prior art, and to solve the technical problem of the lack of automatic locking mechanism in the prior art insulation tongs.

[0005] In order to achieve the above technical target, the present application provides an insulation tong, which comprises an insulation and cross-hinged static tong and a dynamic tong, and further comprises: a first insulation rod, one end of which is fixedly connected to the input end of the static tong; a second insulation rod, one end of which is hingedly connected to the input end of the dynamic tong; a ratchet seat, which is fixed to the first insulation rod and is close to the end of the first insulation rod away from the static tong; a ratchet, which is rotationally connected to the ratchet seat, and a plurality of ratchet teeth are arranged on the ratchet in a circumferential direction, and a tooth slot is formed between adjacent ratchet teeth; an insulation handle, which comprises a hinged rod, one end of the hinged rod is rotationally connected to the ratchet, and the other end is hingedly connected to the end of the second insulation rod away from the dynamic tong; and a swing member, which swings relative to the ratchet seat, and a first pawl is arranged on the swing member, the hinged rod rotates relative to the ratchet seat to drive the dynamic tong to rotate relative to the static tong through the second insulation rod, and the swing member can be swung to a loose stopping position to make the insulation tongs have a loose stopping state, in the loose stopping state, the first pawl extends into a tooth slot to limit the rotation of the output end of the dynamic tong in a direction away from the output end of the static tong.

[0006] The insulating clamp of the present application realizes the self-locking function of the insulating clamp by arranging the ratchet seat, the ratchet and the swing piece on the first insulating rod, so that the operator does not need to hold the insulating clamp, and the working strength is greatly reduced; secondly, the ratchet seat, the ratchet and the swing piece are arranged on the first insulating rod close to the end of the first insulating rod away from the static clamp, so that the ratchet and the swing piece are away from the live body clamped by the movable clamp and the static clamp, and the metal ratchet and the swing piece can keep a sufficient safety distance from the live body, avoiding the generation of arc, sparking and other safety hazards between the ratchet, the swing piece and the live body.

[0007] As preferred, the pawl further comprises a second pawl, the first pawl and the second pawl are respectively arranged on opposite sides in the swing direction of the swing piece, and the swing piece can further swing to a locking position to make the insulating clamp have a locking state, In the locking state, the second pawl extends into a tooth groove to limit the output end of the movable clamp to rotate in the direction towards the output end of the static clamp.

[0008] The adoption of the foregoing technical solution makes the two pawls on the swing piece and the ratchet cooperate to selectively self-lock the insulating clamp in the closing and opening directions, improving the use convenience of the insulating clamp.

[0009] As preferred, a spring and a steel ball are further included, the side of the swing piece away from the ratchet is provided with a first inclined surface adjacent to the first pawl and a second inclined surface adjacent to the second pawl, the first inclined surface and the second inclined surface respectively extend in the direction of the two pawls from the center of the side of the swing piece away from the ratchet, so that the straight-line distance between the two pawls and the adjacent inclined surfaces gradually decreases, The spring pre-tightly press-bonds the steel ball to the second inclined surface to make the insulating clamp be in the locking state, The spring pre-tightly press-bonds the steel ball to the first inclined surface to make the insulating clamp be in the locking state, The swing of the swing piece overcomes the elastic force of the spring to make the insulating clamp switch between the locking state and the locking state.

[0010] The adoption of the foregoing technical solution realizes that the insulating clamp can be limited to the locking state or the locking state by the elastic force of the spring through the spring, the steel ball and the first inclined surface and the second inclined surface adjacent to the first pawl and the second pawl respectively, and the free switching of the insulating clamp between the locking state and the locking state can be realized by overcoming the elastic force of the spring.

[0011] As preferred, the first inclined surface and the middle line of the cross section of the swing piece form an included angle a1 less than 90°, the second inclined surface and the middle line of the cross section of the swing piece form an included angle a2 less than 90°, the swing angle of the swing piece relative to the ratchet is β, a1+β / 2<90°, and a2+β / 2<90°.

[0012] By limiting the size of α1 and α2, the inclined surface will not tilt towards the steel ball when the inclined surface is in pressure connection with the steel ball, so that the swing piece which swings to one side to be in the loose or tight position will not have the tendency to swing to the other side under the action of the steel ball, so that the swing piece can better cooperate with the ratchet wheel to realize the loose or tight of the insulation clamp.

[0013] Preferably, the swing piece is further provided with a protruding rib which connects the first inclined surface and the second inclined surface.

[0014] By the above technical scheme, when the steel ball is in pressure connection with the first inclined surface or the second inclined surface, the protruding rib is connected between the first inclined surface and the second inclined surface, so that the steel ball is stopped on the other side of the inclined surface in pressure connection with the steel ball, which increases the difficulty of the swing piece to cross the steel ball on the side away from the ratchet wheel, so that the swing piece can better cooperate with the ratchet wheel to realize the loose or tight of the insulation clamp.

[0015] Preferably, the insulation handle further comprises an operating rod for driving the rotation of the articulated rod, the operating rod is formed by the articulated rod extending away from the second insulation rod.

[0016] By the above technical scheme, the operating rod is arranged on the insulation handle, so that the operator can more conveniently rotate the insulation handle, and the operation convenience of the insulation clamp is improved.

[0017] Preferably, one of the articulated rod and the second insulation rod is provided with a first articulated groove, and the other is provided with a first articulated plate, the first articulated groove is provided with an opening which is open to the first articulated plate, and the first articulated plate is inserted into the groove wall of the first articulated groove through the opening and is rotationally connected with the groove wall. When the movable jaw moves towards the fixed jaw to make the insulation clamp have a limit clamping state, the groove bottom of the first articulated groove stops the first articulated plate to limit the continuous rotation of the second insulation rod to make the insulation clamp be in the limit clamping state.

[0018] By the cooperation of the first articulated groove and the first articulated plate, the rotation connection between the articulated rod and the second insulation rod is realized, and at the same time, the groove bottom of the first articulated groove stops the first articulated plate to make the insulation clamp be in the limit clamping state, so that the over-closing of the insulation clamp is avoided, and the problem that the parts in the insulation clamp are damaged due to excessive force is solved.

[0019] Preferably, one of the second insulation rod and the movable jaw is provided with a second articulated groove, and the other is provided with a second articulated plate, the second articulated groove is provided with an opening which is open to the second articulated plate, and the second articulated plate is inserted into the groove wall of the second articulated groove through the opening and is rotationally connected with the groove wall. The moving pliers back to the static pliers movement makes the insulation clamp have a limit open state, and the groove bottom of the second hinged groove stops the second hinged plate to limit the second insulation rod from continuing to rotate, so that the insulation clamp is in the limit open state.

[0020] By the cooperation of the second hinged groove and the second hinged plate, the rotation connection between the moving pliers and the second insulation rod is realized, and meanwhile, the groove bottom of the second hinged groove stops the second hinged plate to make the insulation clamp in the limit open state, so that the over opening of the insulation clamp is avoided.

[0021] As a preferred, the static pliers and the moving pliers have a first hinged point, the moving pliers and the second insulation rod have a second hinged point, the straight line distance between the first hinged point and the second hinged point is L1, the output end of the moving pliers and the first hinged point have a maximum straight line distance L2, and 0.3≤L1 / L2≤0.5.

[0022] By the foregoing technical solution, the moving pliers constitute a force lever, the distance required by the moving pliers input end movement is reduced, so that the rotation angle required by the hinged rod is reduced, and the operation of the insulation clamp is more simple; meanwhile, the lever ratio of the moving pliers constituting the force lever is also avoided, so that the operation strength of the insulation clamp is reduced.

[0023] As a preferred, the static pliers and the moving pliers have a first hinged point, the moving pliers and the second insulation rod have a second hinged point, the second insulation rod and the hinged rod have a third hinged point, the hinged rod and the ratchet seat have a fourth hinged point, the straight line distance between the first hinged point and the second hinged point is L1, the straight line distance between the third hinged point and the fourth hinged point is L3, and 0.7≤L1 / L3≤1.

[0024] By the foregoing technical solution, the rotation angle required by the hinged rod and the rotation angle of the moving pliers constitute a defined proportional relationship, so that the rotation angle required by the hinged rod is neither too large nor too small, and the operation of the insulation clamp is more simple.

[0025] These features and advantages of the present application will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the insulation clamp in the embodiment of the present application; Figure 2 It is a schematic diagram of the closed insulation clamp in the embodiment of the present application; Figure 3 It is a schematic diagram of the open insulation clamp in the embodiment of the present application; Figure 4Figure 1 is a schematic view of the ratchet wheel and the swing member in the tight position in the embodiment of the present application; Figure 5 Figure 2 is a schematic view of the ratchet wheel and the swing member in the loose position in the embodiment of the present application; Figure 6 Figure 3 is a schematic view of the swing member relative to the ratchet wheel in the embodiment of the present application.

[0027] Reference signs: 100, static jaw; 200, dynamic jaw, 210, second hinged groove; 300, first insulating rod; 400, second insulating rod, 410, first hinged plate, 420, second hinged plate; 500, ratchet wheel seat, 501, accommodating groove, 510, ratchet wheel, 511, ratchet tooth, 512, tooth groove, 520, spring, 530, steel ball; 600, swing member, 610, first pawl, 620, second pawl, 630, first inclined surface, 640, second inclined surface, 640, protruding rib; 700, insulating handle, 710, hinged rod, 711, first hinged groove, 720, operating rod. DETAILED DESCRIPTION

[0028] The technical solutions of the embodiments of the present application will be explained and described below in combination with the drawings of the embodiments of the present application. However, the following embodiments are only preferred embodiments of the present application, and not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor also belong to the protection scope of the present application.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0030] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "multiple", "several" is two or more, unless otherwise explicitly limited.

[0031] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] As shown in Figures 1 to 6 The present application provides an insulating clamp, which comprises a static clamp 100 and a dynamic clamp 200 which are insulated and cross-hinged. The main body of the static clamp 100 and the dynamic clamp 200 is made of metal material and is wrapped with an insulating layer. The output end of the dynamic clamp 200 and the static clamp 100 is used for clamping a live body.

[0033] The insulating clamp further comprises a first insulating rod 300, a second insulating rod 400, a ratchet seat 500, a ratchet 510, a swing member 600 and an insulating handle 700. One end of the first insulating rod 300 is fixedly connected to the input end of the static clamp 100. One end of the second insulating rod 400 is hingedly connected to the input end of the dynamic clamp 200. The ratchet seat 500 is fixed to the first insulating rod 300 and is close to the end of the first insulating rod 300 which is away from the static clamp 100. The ratchet 510 is rotatably connected to the ratchet seat 500, and a plurality of ratchet teeth 511 are arranged on the ratchet 510 at intervals in the circumferential direction, and a tooth groove 512 is formed between adjacent ratchet teeth 511. The swing member 600 is rotatably connected to the ratchet seat 500 and swings relative to the ratchet seat 500. The insulating handle 700 comprises a hinged rod 710, one end of which is rotatably connected to the ratchet seat 500 and rotates with the ratchet 510, and the other end is hingedly connected to the end of the second insulating rod 400 which is away from the dynamic clamp 200.

[0034] The dynamic clamp 200, the second insulating rod 400, the hinged rod 710 and the first insulating rod 300 constitute a four-bar linkage mechanism. The first insulating rod 300 can be regarded as a fixed component of the four-bar linkage mechanism, and the rotation of the hinged rod 710 relative to the first insulating rod 300 drives the dynamic clamp 200 to move through the second insulating rod 400. The movement of the dynamic clamp 200 causes it to move towards the static clamp 100 to close the insulating clamp, or to move away from the static clamp 100 to open the insulating clamp.

[0035] The first pawl 610 on the swing piece 600 can swing to a loosening-stopping position to make the insulation clamp have a loosening-stopping state.

[0036] The swing piece 600 can be swung by operating personnel to swing one end thereof.

[0037] When the swing piece 600 is in the loosening-stopping position, the first pawl 610 extends into a tooth groove 512, and the rotation of the ratchet wheel 510 caused by the rotation of the output end of the movable jaw 200 in the direction away from the output end of the static jaw 100 makes the slot wall of the tooth groove 512 push the first pawl 610 to have a tendency to extend into the tooth groove 512, and the tooth groove 512 stops the further movement of the first pawl 610, thereby realizing the loosening stopping of the insulation clamp.

[0038] The first insulation rod 300, the second insulation rod 400 and the insulation handle 700 are made of an insulation material in accordance with the standard of GB / T 13398-2008 “Insulation Rod for Live Working”. The insulation material is preferably an insulation resin glass steel material, so as to reduce the weight of the insulation clamp. The main body of the static jaw 100 and the movable jaw 200 is preferably made of an aluminum alloy, so as to also reduce the weight of the insulation clamp.

[0039] The ratchet wheel 510 and the swing piece 600 are arranged at the rotating connection position, and need to bear a large force when the insulation clamp is self-locked, so the ratchet wheel 510 and the swing piece 600 are made of a high-strength metal material, for example, a steel material.

[0040] The insulation clamp provided by the present application realizes the self-locking function of the insulation clamp by arranging the ratchet wheel seat 500, the ratchet wheel 510 and the swing piece 600 on the first insulation rod 300, so that the operating personnel do not need to hold the insulation clamp, and the working strength is greatly reduced. In addition, the ratchet wheel seat 500, the ratchet wheel 510 and the swing piece 600 are arranged on the first insulation rod 300 close to the end of the first insulation rod 300 away from the static jaw 100, so that the ratchet wheel 510 and the swing piece 600 are far away from the live body clamped by the movable jaw 200 and the static jaw 100, and the metal ratchet wheel 510 and the swing piece 600 can keep a sufficient safe distance from the live body, so as to avoid the generation of arc, sparking and other safety hazards between the ratchet wheel 510 and the swing piece 600 and the live body.

[0041] Based on the foregoing embodiment, in the present embodiment, as Figure 4 , Figure 5The pawl further comprises a second pawl 620, the first pawl 610 and the second pawl 620 are respectively arranged on opposite sides of the swing direction of the swing member 600, and the swing member 600 can also swing to a locking position to make the insulation clamp have a locking state. In the locking state, the second pawl 620 extends into a tooth groove 512 to limit the rotation of the output end of the movable jaw 200 in the direction towards the output end of the fixed jaw 100.

[0042] When the insulation clamp is in the locking state, the movable jaw 200 cannot move towards the fixed jaw 100, but can move away from the fixed jaw 100, so that the insulation clamp can continue to open but cannot be closed.

[0043] When the live body is placed between the fixed jaw 100 and the movable jaw 200 of the insulation clamp, the insulation clamp is adjusted to the locking state, and the insulation clamp is self-locked to form a space between the input ends of the fixed jaw 100 and the movable jaw 200 for the live body to enter. After the insulation clamp is adjusted to the unlocking state, the driving hinge rod 710 is rotated, so that the insulation clamp clamps the live body to realize self-locking of the insulation clamp, and the live body is prevented from separating from the insulation clamp.

[0044] When the swing member 600 is in the locking position, the second pawl 620 extends into a tooth groove 512, and the rotation of the ratchet wheel 510 caused by the rotation of the output end of the movable jaw 200 in the direction towards the output end of the fixed jaw 100 makes the slot wall of the tooth groove 512 push the second pawl 620 to make the second pawl 620 have a tendency to further extend into the tooth groove 512, and the tooth groove 512 stops the further movement of the second pawl 620, thereby realizing the locking of the insulation clamp.

[0045] The swing member 600 can be switched between the unlocking position and the locking position by the operation of the operator.

[0046] Through the above arrangement, the two pawls on the swing member 600 and the ratchet wheel 510 cooperate to realize the selective self-locking of the insulation clamp in the closing and opening directions, thereby improving the use convenience of the insulation clamp.

[0047] Based on the foregoing embodiment, in the present embodiment, as shown in Figure 4 , Figure 5The insulation clamp further comprises a spring 520 and a steel ball 530, and the side of the swing piece 600 away from the ratchet wheel 510 is provided with a first inclined surface 630 adjacent to the first pawl 610 and a second inclined surface 640 adjacent to the second pawl 620, the first inclined surface 630 and the second inclined surface 640 gradually reduce the straight-line distance between the two pawls and the inclined surfaces from the center of the side of the swing piece 600 away from the ratchet wheel 510, the spring 520 pre-tightly presses the steel ball 530 against the second inclined surface 640 to make the insulation clamp in the loose-stopping state, the spring 520 pre-tightly presses the steel ball 530 against the first inclined surface 630 to make the insulation clamp in the tight-stopping state, and the swing of the swing piece 600 overcomes the elastic force of the spring 520 to make the insulation clamp switch between the loose-stopping state and the tight-stopping state.

[0048] The first inclined surface 630 gradually reduces the straight-line distance between the first pawl 610 and the first inclined surface 630 in the direction of the inclined extension, and the second inclined surface 640 gradually reduces the straight-line distance between the second pawl 620 and the second inclined surface 640 in the direction of the inclined extension. When the swing piece 600 swings to the loose-stopping position, the first pawl 610 is close to the ratchet wheel 510 and coupled in a tooth groove 512, the first inclined surface 630 is away from the steel ball 530, the second inclined surface 640 is close to the steel ball 530, and the steel ball 530 is pre-tightly pressed on the second inclined surface 640 by the pre-tightening force of the spring 520. The force applied to the second inclined surface 640 by the steel ball 530 makes the swing piece 600 remain in the loose-stopping position, and the first pawl 610 remains coupled in the tooth groove 512.

[0049] When the ratchet wheel 510 rotates in the direction of closing the insulation clamp, the tooth groove 512 pushes the first pawl 610 to move, the pushing force is transmitted to the swing piece 600 to make the second inclined surface 640 push the steel ball 530 to move and compress the spring 520, the first pawl 610 is separated from the tooth groove 512 and crosses a ratchet tooth 511 under the action of the ratchet wheel 510, and then is coupled into the next tooth groove 512 under the action of the elastic force of the spring 520, so as to realize the step-by-step closing of the insulation clamp.

[0050] Correspondingly, when the swing piece 600 swings to the tight-stopping position, the second pawl 620 is close to the ratchet wheel 510 and coupled in a tooth groove 512, the second inclined surface 640 is away from the steel ball 530, the first inclined surface 630 is close to the steel ball 530, and the steel ball 530 is pre-tightly pressed on the first inclined surface 630 by the pre-tightening force of the spring 520. The force applied to the first inclined surface 630 by the steel ball 530 makes the swing piece 600 remain in the loose-stopping position, and the second pawl 620 remains coupled in the tooth groove 512.

[0051] When the ratchet wheel 510 rotates in the direction of opening the insulating clamp, the tooth groove 512 pushes the second pawl 620 to move, the pushing force is transmitted to the swing piece 600 to make the first inclined surface 630 push the steel ball 530 to move and compress the spring 520, the second pawl 620 is disengaged from the tooth groove 512 under the action of the ratchet wheel 510 and passes one ratchet tooth 511, and then is coupled into the next tooth groove 512 under the elastic force of the spring 520, so as to realize the opening of the insulating clamp step by step.

[0052] The operator can drive the swing piece 600 to swing, so that the cooperation of the inclined surface and the steel ball 530 further compresses the spring 520, and at the same time, the insulating clamp can be switched between the loosening state and the tightening state by swinging the swing piece 600 to pass the steel ball 530 on the side away from the ratchet wheel 510, and the spring 520 is elastically reset after the state of the insulating clamp is switched to re-couple the first pawl 610 or the second pawl 620 in a tooth groove 512, so as to re-limit the insulating clamp in the current state.

[0053] The ratchet wheel seat 500 is provided with a containing groove 501, the containing groove 501 has a containing cavity, the spring 520 is pre-tightly received in the containing cavity and pushes the steel ball 530 to be pressed on the swing piece 600, and part of the containing cavity of the containing groove 501 is used to accommodate part of the steel ball 530 when the steel ball 530 is pushed by the first inclined surface 630 or the second inclined surface 640.

[0054] The insulating clamp of the embodiment realizes that the insulating clamp can be limited in the loosening state or the tightening state by the elastic force of the spring 520, and the free switching of the insulating clamp between the loosening state and the tightening state can be realized by overcoming the elastic force of the spring 520 through the spring 520, the steel ball 530 and the first inclined surface 630 and the second inclined surface 640 adjacent to the first pawl 610 and the second pawl 620 respectively.

[0055] The preferred embodiment of the present embodiment is as shown in the figure, Figures 4 to 6 The first inclined surface 630 and the middle line A1 of the cross section of the swing piece 600 form an included angle α1 less than 90°, the second inclined surface 640 and the middle line A1 of the cross section of the swing piece 600 form an included angle α2 less than 90°, the swing angle of the swing piece 600 relative to the ratchet tooth 511 is β, α1+β / 2<90°, α2+β / 2<90°.

[0056] The force of the steel ball 530 pressed on the inclined surface generates a component force extending along the normal direction at the contact position of the steel ball 530 on the inclined surface. When the swing piece 600 swings to one side to be in the loosening position or the tightening position, if the inclined surface pressed on the steel ball 530 is inclined to the direction of the steel ball 530, the component force has a trend to push the swing piece 600 to swing to the other side, so that the swing piece 600 cannot well cooperate with the ratchet wheel 510 to realize the loosening or tightening.

[0057] By limiting the sizes of α1 and α2, it is ensured that the inclined surface will not tilt towards the steel ball 530 when the inclined surface is in pressure contact with the steel ball 530, so that the swing member 600 which swings to one side to be in the loose or tight position will not have a tendency to swing to the other side under the action of the steel ball 530, so that the swing member 600 can better cooperate with the ratchet wheel 510 to realize the loose or tight of the insulation clamp.

[0058] It should be noted that when the swing tendency of the swing member 600 to one side drives the swing member 600 to move, the inclined surface moves to change the inclination relationship between the inclined surface and the steel ball 530, and when the inclined surface is perpendicular to the line connecting the center of the steel ball 530 and the rotation center of the swing member 600, the swing tendency to the other side disappears. In actual use of the product, if α1 and α2 are too large, the cooperation between the inclined surface and the steel ball 530 enables the swing member 600 to limit the ratchet wheel 510 in a relatively balanced position range, but the swing member 600 will swing under the action of a small external force at this position, at this time, the coupling degree between the pawl and the tooth groove 512 is low, and the loose or tight effect of the swing member 600 is poor.

[0059] In another preferred embodiment, as shown in Figure 4 、 Figure 5 , the swing member 600 is further provided with a protruding rib 640 which connects the first inclined surface 630 and the second inclined surface 640.

[0060] When the steel ball 530 is in pressure contact with the first inclined surface 630 or the second inclined surface 640, the protruding rib 640 connects between the first inclined surface 630 and the second inclined surface 640, so as to stop the steel ball 530 on the other side of the inclined surface in pressure contact with the steel ball 530, increase the difficulty of the swing member 600 to cross the steel ball 530 on the side away from the ratchet wheel 510, and enable the swing member 600 to better cooperate with the ratchet wheel 510 to realize the loose or tight of the insulation clamp.

[0061] In the embodiment, the cross section of the protruding rib 640 is in the shape of a circular arc. In this way, the protruding rib 640 crosses the steel ball 530 more smoothly, and the switching between the loose state and the tight state of the insulation clamp is also more smooth.

[0062] In some other embodiments, the cross section of the protruding rib 640 can also be in other shapes.

[0063] The technical solution of the preferred embodiment can be implemented alone, or can be combined with the technical solution of the previous preferred embodiment.

[0064] Based on all the foregoing embodiments, in the embodiment, the insulation handle 700 further comprises an operating rod 720 for driving the articulated rod 710 to rotate, and the operating rod 720 is formed by the articulated rod 710 extending in the direction away from the second insulation rod 400.

[0065] The operation lever 720 is arranged on the insulating handle 700, so that the operator can rotate the insulating handle 700 more conveniently, and the operation convenience of the insulating clamp is improved.

[0066] Based on all the foregoing embodiments, in the present embodiment, as shown in Figure 2 、 Figure 3 The first hinge groove 711 is arranged on the hinge rod 710, the first hinge plate 410 is arranged on the second insulating rod 400, the first hinge groove 711 is provided with an opening open to the first hinge plate 410, the first hinge plate 410 extends into the first hinge groove 711 through the opening and is rotationally connected to the groove wall of the first hinge groove 711. When the movable clamp 200 moves towards the static clamp 100, the insulating clamp has a limit closed state, and the groove bottom of the first hinge groove 711 stops the first hinge plate 410 to limit the second insulating rod 400 from continuing to rotate so that the insulating clamp is in the limit closed state.

[0067] Through the cooperation of the first hinge groove 711 and the first hinge plate 410, the rotation connection between the hinge rod 710 and the second insulating rod 400 is realized, and at the same time, the groove bottom of the first hinge groove 711 stops the first hinge plate 410 so that the insulating clamp is in the limit closed state, avoiding the problem of excessive closing of the insulating clamp, so that the parts in the insulating clamp are damaged due to excessive stress.

[0068] When the operator cannot use the current insulating clamp to clamp the live body, it is necessary to replace a smaller insulating clamp to operate.

[0069] In other embodiments, the first hinge plate 410 can be arranged on the hinge rod 710, and the first hinge groove 711 can be arranged on the second insulating rod 400.

[0070] Based on all the foregoing embodiments, in the present embodiment, as shown in Figure 2 、 Figure 3 The second hinge groove 210 is arranged on the movable clamp 200, the second hinge plate 420 is arranged on the second insulating rod 400, the second hinge groove 210 is provided with an opening open to the second hinge plate 420, and the second hinge plate 420 extends into the second hinge groove 210 through the opening and is rotationally connected to the groove wall of the second hinge groove 210. When the movable clamp 200 moves away from the static clamp 100, the insulating clamp has a limit open state, and the groove bottom of the second hinge groove 210 stops the second hinge plate 420 to limit the second insulating rod 400 from continuing to rotate so that the insulating clamp is in the limit open state.

[0071] The rotation connection between the movable jaw 200 and the second insulating rod 400 is realized through the cooperation of the second hinge groove 210 and the second hinge plate 420, and the groove bottom of the second hinge groove 210 stops the second hinge plate 420 to make the insulating clamp in the limit opening state, avoiding the over opening of the insulating clamp.

[0072] When the live body cannot enter the insulating clamp through the opening formed between the movable jaw 200 and the static jaw 100 of the current insulating clamp, the operator needs to replace a larger insulating clamp to operate.

[0073] In other embodiments, the movable jaw 200 is provided with the second hinge plate 420, and the second insulating rod 400 is provided with the second hinge groove 210.

[0074] Based on all the foregoing embodiments, in the present embodiment, as shown in Figure 2 The static jaw 100 and the movable jaw 200 have a first hinge point S1, the movable jaw 200 and the second insulating rod 400 have a second hinge point S2, the straight line distance between the first hinge point S1 and the second hinge point S2 is L1, the output end of the movable jaw 200 and the first hinge point S1 have a maximum straight line distance L2, and 0.3≤L1 / L2≤0.5.

[0075] Through the above setting, the movable jaw 200 constitutes a force lever, the distance required for the input end of the movable jaw 200 to move is reduced, the rotation angle required for the hinge rod 710 is reduced, and the operation of the insulating clamp is more simple; at the same time, the lever ratio of the movable jaw 200 constituting the force lever is also avoided, the operation of the insulating clamp is reduced, and the operation strength of the insulating clamp is reduced.

[0076] Based on all the foregoing embodiments, in the present embodiment, as shown in Figure 3 The static jaw 100 and the movable jaw 200 have a first hinge point S1, the movable jaw 200 and the second insulating rod 400 have a second hinge point S2, the second insulating rod 400 and the hinge rod 710 have a third hinge point S3, the hinge rod 710 and the ratchet seat 500 have a fourth hinge point S4, the straight line distance between the first hinge point S1 and the second hinge point S2 is L1, the straight line distance between the third hinge point S3 and the fourth hinge point S4 is L3, and 0.7≤L1 / L3≤1.

[0077] The movable jaw 200, the second insulating rod 400, the hinge rod 710 and the first insulating rod 300 constitute a four-bar linkage mechanism, by limiting 0.7≤L1 / L3≤1, the rotation angle required for the hinge rod 710 and the rotation angle of the movable jaw 200 constitute a limited proportional relationship, the rotation angle required for the hinge rod 710 is neither too large nor too small, and the operation of the insulating clamp is more simple.

[0078] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and those skilled in the art should understand that the present application includes but is not limited to the contents described in the above specific embodiments and the drawings. Any modification not deviating from the functional and structural principles of the present application shall be included in the scope of the claims.

Claims

1. An insulating tongs comprising an insulating and cross-hinged static jaw and a dynamic jaw, characterized in that, Also comprising: a first insulating rod, one end of which is fixedly connected to the input end of the static jaw; a second insulating rod, one end of which is hingedly connected to the input end of the dynamic jaw; a ratchet seat, which is fixed to the first insulating rod and is close to the end of the first insulating rod away from the static jaw; a ratchet, which is rotatably connected to the ratchet seat, the ratchet being provided with a plurality of ratchet teeth circumferentially spaced apart, a tooth slot being formed between adjacent ratchet teeth; an insulating handle, which comprises a hinged rod, one end of the hinged rod being rotatable with the ratchet and the other end being hingedly connected to the end of the second insulating rod away from the dynamic jaw; and a swing member, which swings relative to the ratchet seat, the swing member being provided with a first pawl, the hinged rod rotates relative to the ratchet seat to drive the dynamic jaw to rotate relative to the static jaw through the second insulating rod, the swing member can be swung to a loose-stopping position to make the insulating clamp have a loose-stopping state, in the loose-stopping state, the first pawl extends into a tooth slot to limit the output end of the dynamic jaw to rotate in a direction away from the output end of the static jaw.

2. An insulating tongs as claimed in claim 1, characterized in that the pawl further comprises a second pawl, the first pawl and the second pawl being respectively arranged on opposite sides in the swinging direction of the swing member, the swing member can also be swung to a tight-stopping position to make the insulating clamp have a tight-stopping state, in the tight-stopping state, the second pawl extends into a tooth slot to limit the output end of the dynamic jaw to rotate in a direction toward the output end of the static jaw.

3. An insulating tongs as claimed in claim 2, wherein, further comprising a spring and a steel ball, the swing member being provided with a first inclined surface adjacent to the first pawl and a second inclined surface adjacent to the second pawl on a side of the swing member away from the ratchet, the first inclined surface and the second inclined surface extending obliquely from the center of the side of the swing member away from the ratchet toward the two pawls respectively, so that the straight-line distance between the two pawls and the adjacent inclined surface gradually decreases, the spring pre-tightly presses the steel ball against the second inclined surface to make the insulating clamp have the loose-stopping state, the spring pre-tightly presses the steel ball against the first inclined surface to make the insulating clamp have the tight-stopping state, the swing of the swing member overcomes the elastic force of the spring to make the insulating clamp switchable between the loose-stopping state and the tight-stopping state.

4. An insulating tongs according to claim 3, wherein the first inclined surface and the center line of the cross section of the swing member form an included angle α1 less than 90°, the second inclined surface and the center line of the cross section of the swing member form an included angle α2 less than 90°, the swing angle of the swing member relative to the ratchet teeth is β, α1+β / 2<90°, α2+β / 2<90°.

5. An insulating tongs as claimed in claim 3, wherein, the swing member is further provided with a protruding rib, the protruding rib connecting the first inclined surface and the second inclined surface.

6. An insulating tongs as defined in claim 1, wherein the insulating handle further comprises an operating rod for driving the hinged rod to rotate, the operating rod extending from the hinged rod in a direction away from the second insulating rod.

7. An insulating tongs as claimed in claim 1, wherein, one of the hinged rod and the second insulating rod is provided with a first hinged groove, and the other is provided with a first hinged plate, the first hinged groove being provided with an opening open to the first hinged plate, the first hinged plate extending into the first hinged groove through the opening and being rotatably connected to the groove wall of the first hinged groove; the dynamic jaw moves toward the static jaw to make the insulating clamp have a limit-closing state, the groove bottom of the first hinged groove stops the first hinged plate to limit the second insulating rod to continue rotating to make the insulating clamp have the limit-closing state.

8. An insulating tongs as defined in claim 1, wherein, The second insulating rod and the movable jaw are provided with a second hinge groove and a second hinge plate respectively, the second hinge groove is provided with an opening open to the second hinge plate, and the second hinge plate is inserted into the second hinge groove through the opening and is rotationally connected to the groove wall of the second hinge groove; The movable jaw moves away from the fixed jaw to make the insulating clamp have a limit opening state, and the bottom of the second hinge groove stops the second hinge plate to limit the second insulating rod from rotating continuously to make the insulating clamp have the limit opening state.

9. An insulating tongs as claimed in claim 1, wherein, The fixed jaw and the movable jaw have a first hinge point, the movable jaw and the second insulating rod have a second hinge point, the straight-line distance between the first hinge point and the second hinge point is L1, the output end of the movable jaw and the first hinge point have a maximum straight-line distance L2, and 0.3≤L1 / L2≤0.

5.

10. An insulating tongs as defined in claim 1, wherein The fixed jaw and the movable jaw have a first hinge point, the movable jaw and the second insulating rod have a second hinge point, the second insulating rod and the hinge rod have a third hinge point, the hinge rod and the ratchet seat have a fourth hinge point, the straight-line distance between the first hinge point and the second hinge point is L1, and the straight-line distance between the third hinge point and the fourth hinge point is L3, and 0.7≤L1 / L3≤1.

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